class_docstr: MLP w/ GLU style gating
  See: https://arxiv.org/abs/1612.08083, https://arxiv.org/abs/2002.05202
code: def forward(self, x):
      x = self.fc1(x)
      x1, x2 = x.chunk(2, dim=self.chunk_dim)
      x = x1 * self.act(x2) if self.gate_last else self.act(x1) * x2
      x = self.drop1(x)
      x = self.norm(x)
      x = self.fc2(x)
      x = self.drop2(x)
      return x
  
imports: from functools import partial
  from torch import nn
  from .grn import GlobalResponseNorm
  from .helpers import to_2tuple
label_desc: Use image node_id 3 for calling the GluMlp obj's underlying member method code with example usage: obj.forward(x) and returns: x